不同表面结构个性化根形种植体的应力分布分析

The stress distribution analysis of custom made root-analogue implant with different surface structures

目的:通过三维有限元法对不同表面结构个性化根形种植体进行应力分析。方法:建立多孔联通表面结构和光滑连续表面结构的两组个性化根形种植体及4类骨组织模型。分别施加垂直向力、侧向力、组合力,分析不同表面结构个性化根形种植体周围骨组织的Von-Mises等效应力、等效应变。结果:在相同载荷及骨质条件下,光滑连续表面结构的个性化根形种植体周围骨组织承受的应力、产生的应变,均高于多孔联通表面结构个性化根形种植体周围骨组织。结论:多孔联通表面结构的个性化根形种植体较光滑连续表面结构的个性化根形种植体周围骨组织承受的应力,产生的应变更符合骨组织的力学适应性。

Objective:To analyze the stress of custom made root-analogue implant with different surface structures by three-dimensional finite element analysis.Methods:Two groups of personalized root implants with the interconnected porous surface structure and the smooth continuous surface structure,and four types of bone tissue models were established.The equivalent stress and strain of Von-Mises on bone tissue around implants with different surface structures were analyzed by applying the vertical force,the oblique force,and the combination occlusal force.Results:The stress and strain of the bone tissue around the personalized root implant with the smooth continuous surface structure were higher than those of the bone tissue around the personalized root implant with the interconnected porous surface structure under the same load and bone mass condition.Conclusion:Compared with the smooth continuous surface structure,the resulting change of the stress and strain of the bone tissue around the personalized root implant with the interconnected porous surface structure is consistent with the mechanical adaptability of the bone tissue.